diff --git a/lib/model.js b/lib/model.js
index 12428a6..9dceac0 100644
--- a/lib/model.js
+++ b/lib/model.js
@@ -461,7 +461,7 @@ class Model extends Entity {
         if (ancestors) {
             query.hasAncestor(this.gstore.ds.key(ancestors.slice()));
         }
-
+        query.select('__key__');
         return query.run().then(onEntities, onError);
 
         // ------------------------------------------------